Question : Directions: Select the number from among the given options that can replace the (?) in the following series.
0, 5, 12, 21, ?, 45, 60
Option 1: 35
Option 2: 32
Option 3: 34
Option 4: 30
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Correct Answer: 32
Solution :
Given:
0, 5, 12, 21, ?, 45, 60
Add the consecutive odd numbers (starting from 5) to the previous number to get the next number –
0 + 5 = 5; 5 + 7 = 12; 12 + 9 = 21; 21 + 11 = 32; 32 + 13 = 45; 45 + 15 = 60
So, 32 is the missing number. Hence, the second option is correct.
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